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參數(shù)資料
| 型號(hào)： | UC1845AAY |
| 廠商： | Microsemi Corporation |
| 英文描述： | CURRENT MODE PWM CONTROLLER |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大小： | 530K |
| 代理商： | UC1845AAY |
6
UC1842A/3A/4A/5A
UC2842A/3A/4A/5A
APPLICATIONS DATA (cont.)
Oscillator Section
Open-Loop Laboratory Test Fixture
Oscillator Frequency vs Timing Resistance
Maximum Duty Cycle vs Timing Resistor
High peak currents associated with capacitive loads necessi-
tate careful grounding techniques. Timing and bypass capaci-
tors should be connected close to pin 5 in a single point
ground. The transistor and 5k potentiometer are used to sam-
ple the oscillator waveform and apply an adjustable ramp to
pin 3.
Slope Compensation
A fraction of the oscillator ramp can be resistively
summed with the current sense signal to provide slope
compensation for converters requiring duty cycles over
50%.
Note that capacitor, C, forms a filter with R2 to suppress
the leading edge switch spikes.
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| UC1845A-EP | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT-MODE PWM CONTROLLER |
| UC1845AJ | 制造商:Texas Instruments 功能描述:Current Mode PWM Controller 1A 8-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:CUR MODE PWM CONT - Rail/Tube |
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